/*
* FindBugs - Find bugs in Java programs
* Copyright (C) 2003-2005 University of Maryland
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.umd.cs.findbugs.visitclass;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.CheckForNull;
import org.apache.bcel.classfile.AnnotationEntry;
import org.apache.bcel.classfile.Annotations;
import org.apache.bcel.classfile.ArrayElementValue;
import org.apache.bcel.classfile.ElementValue;
import org.apache.bcel.classfile.ElementValuePair;
import org.apache.bcel.classfile.ParameterAnnotationEntry;
import org.apache.bcel.classfile.ParameterAnnotations;
import org.apache.bcel.classfile.SimpleElementValue;
import edu.umd.cs.findbugs.SystemProperties;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import edu.umd.cs.findbugs.internalAnnotations.DottedClassName;
import edu.umd.cs.findbugs.util.ClassName;
/**
* Subclass of PreorderVisitor that visits annotations on classes, fields,
* methods, and method parameters.
*
* @author William Pugh
*/
public class AnnotationVisitor extends PreorderVisitor {
static final boolean DEBUG = SystemProperties.getBoolean("annotation.visitor");
/**
* Visit annotation on a class, field or method
*
* @param annotationClass
* class of annotation
* @param map
* map from names to values
* @param runtimeVisible
* true if annotation is runtime visible
*/
public void visitAnnotation(@DottedClassName String annotationClass, Map<String, ElementValue> map, boolean runtimeVisible) {
if (DEBUG) {
System.out.println("Annotation: " + annotationClass);
for (Map.Entry<String, ElementValue> e : map.entrySet()) {
System.out.println(" " + e.getKey());
System.out.println(" -> " + e.getValue());
}
}
}
protected static String getAnnotationParameterAsString(Map<String, ElementValue> map, String parameter) {
try {
ElementValue ev = map.get(parameter);
if (ev instanceof SimpleElementValue) {
return ((SimpleElementValue) ev).getValueString();
}
return null;
} catch (Exception e) {
return null;
}
}
@CheckForNull
@SuppressFBWarnings("PZLA_PREFER_ZERO_LENGTH_ARRAYS")
protected static String[] getAnnotationParameterAsStringArray(Map<String, ElementValue> map, String parameter) {
try {
ElementValue e = map.get(parameter);
ArrayElementValue a = (ArrayElementValue) e;
int size = a.getElementValuesArraySize();
String[] result = new String[size];
ElementValue[] elementValuesArray = a.getElementValuesArray();
for (int i = 0; i < size; i++) {
result[i] = ((SimpleElementValue) elementValuesArray[i]).getValueString();
}
return result;
} catch (Exception e) {
return null;
}
}
/**
* Visit annotation on a method parameter
*
* @param p
* parameter number, starting at zero ("this" parameter is not
* counted)
* @param annotationClass
* class of annotation
* @param map
* map from names to values
* @param runtimeVisible
* true if annotation is runtime visible
*/
public void visitParameterAnnotation(int p, @DottedClassName String annotationClass, Map<String, ElementValue> map,
boolean runtimeVisible) {
}
public void visitSyntheticParameterAnnotation(int p, boolean runtimeVisible) {
}
/*
private static final String RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS = "RuntimeInvisibleParameterAnnotations";
private static final String RUNTIME_INVISIBLE_ANNOTATIONS = "RuntimeInvisibleAnnotations";
private static final String RUNTIME_VISIBLE_ANNOTATIONS = "RuntimeVisibleAnnotations";
private static final String RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS = "RuntimeVisibleParameterAnnotations";
private Map<String, Object> readAnnotationValues(DataInputStream bytes, int numPairs) throws IOException {
Map<String, Object> values = new HashMap<String, Object>();
for (int j = 0; j < numPairs; j++) {
int memberNameIndex = bytes.readUnsignedShort();
String memberName = ((ConstantUtf8) getConstantPool().getConstant(memberNameIndex)).getBytes();
if (DEBUG) {
System.out.println("memberName: " + memberName);
}
Object value = readAnnotationValue(bytes);
if (DEBUG) {
System.out.println(memberName + ":" + value);
}
values.put(memberName, value);
}
return values;
}
private @DottedClassName
String getAnnotationName(DataInputStream bytes) throws IOException {
int annotationNameIndex = bytes.readUnsignedShort();
String annotationName = ((ConstantUtf8) getConstantPool().getConstant(annotationNameIndex)).getBytes().replace('/', '.');
annotationName = annotationName.substring(1, annotationName.length() - 1);
if (DEBUG) {
System.out.println("Annotation name: " + annotationName);
}
return annotationName;
}
private Object readAnnotationValue(DataInputStream bytes) throws IOException {
try {
char tag = (char) bytes.readUnsignedByte();
if (DEBUG) {
System.out.println("tag: " + tag);
}
switch (tag) {
case '[': {
int sz = bytes.readUnsignedShort();
if (DEBUG) {
System.out.println("Array of " + sz + " entries");
}
Object[] result = new Object[sz];
for (int i = 0; i < sz; i++) {
result[i] = readAnnotationValue(bytes);
}
return result;
}
case 'B':
case 'C':
case 'D':
case 'F':
case 'I':
case 'J':
case 'S':
case 'Z':
case 's':
case 'c':
int cp_index = bytes.readUnsignedShort();
Constant c = getConstantPool().getConstant(cp_index);
switch (tag) {
case 'B':
return (byte) ((ConstantInteger) c).getBytes();
case 'C':
return (char) ((ConstantInteger) c).getBytes();
case 'D':
return new Double(((ConstantDouble) c).getBytes());
case 'F':
return new Float(((ConstantFloat) c).getBytes());
case 'I':
return ((ConstantInteger) c).getBytes();
case 'J':
return ((ConstantLong) c).getBytes();
case 'S':
return (char) ((ConstantInteger) c).getBytes();
case 'Z':
return Boolean.valueOf(((ConstantInteger) c).getBytes() != 0);
case 's':
return ((ConstantUtf8) c).getBytes();
case 'c':
String cName = ((ConstantUtf8) c).getBytes().replace('/', '.');
if (cName.startsWith("L") && cName.endsWith(";")) {
cName = cName.substring(1, cName.length() - 1);
}
if (DEBUG) {
System.out.println("cName: " + cName);
}
return cName;
default:
if (DEBUG) {
System.out.println("Impossible");
}
throw new IllegalStateException("Impossible");
}
case '@':
throw new IllegalArgumentException("Not ready to handle annotations as elements of annotations");
case 'e': {
int cp1 = bytes.readUnsignedShort();
ConstantUtf8 c1 = (ConstantUtf8) getConstantPool().getConstant(cp1);
String cName = c1.getBytes().replace('/', '.');
if (cName.startsWith("L") && cName.endsWith(";")) {
cName = cName.substring(1, cName.length() - 1);
}
int cp2 = bytes.readUnsignedShort();
ConstantUtf8 c2 = (ConstantUtf8) getConstantPool().getConstant(cp2);
String result = cName + "." + c2.getBytes();
// System.out.println(result);
return result;
}
default:
if (DEBUG) {
System.out.println("Unexpected tag of " + tag);
}
throw new IllegalArgumentException("Unexpected tag of " + tag);
}
} catch (RuntimeException e) {
if (DEBUG) {
System.out.println("Problem processing annotation " + e.getMessage());
e.printStackTrace();
}
throw e;
}
}
*/
@Override
public void visitParameterAnnotation(ParameterAnnotations arg0) {
ParameterAnnotationEntry[] parameterAnnotationEntries = arg0.getParameterAnnotationEntries();
int numParametersToMethod = getNumberMethodArguments();
int offset = 0;
if (numParametersToMethod > parameterAnnotationEntries.length) {
offset = 1;
}
for (int i = 0; i < parameterAnnotationEntries.length; i++) {
ParameterAnnotationEntry e = parameterAnnotationEntries[i];
for (AnnotationEntry ae : e.getAnnotationEntries()) {
boolean runtimeVisible = ae.isRuntimeVisible();
String name = ClassName.fromFieldSignature(ae.getAnnotationType());
if (name == null) {
continue;
}
name = ClassName.toDottedClassName(name);
Map<String, ElementValue> map = new HashMap<String, ElementValue>();
for (ElementValuePair ev : ae.getElementValuePairs()) {
map.put(ev.getNameString(), ev.getValue());
}
visitParameterAnnotation(offset + i, name, map, runtimeVisible);
}
}
}
/*
* (non-Javadoc)
*
* @see
* org.apache.bcel.classfile.Visitor#visitAnnotation(org.apache.bcel.classfile
* .Annotations)
*/
@Override
public void visitAnnotation(Annotations arg0) {
for (AnnotationEntry ae : arg0.getAnnotationEntries()) {
boolean runtimeVisible = ae.isRuntimeVisible();
String name = ClassName.fromFieldSignature(ae.getAnnotationType());
if (name == null) {
continue;
}
name = ClassName.toDottedClassName(name);
Map<String, ElementValue> map = new HashMap<String, ElementValue>();
for (ElementValuePair ev : ae.getElementValuePairs()) {
map.put(ev.getNameString(), ev.getValue());
}
visitAnnotation(name, map, runtimeVisible);
}
}
}